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A general description is here.
lchoose(a,k) is now defined as log(abs(choose(a,k))), analogously to lfactorial().
Help links containing special characters (e.g. "?") were not generated correctly when rendered in HTML. (PR#14155)
Help links containing special characters (e.g. "?") were not generated correctly when rendered in HTML. (PR#14155)
lchoose(a,k) no longer wrongly gives NaN for negative a.